L-citrulline has immense health benefits from the capacity it has to increase nitric oxide (NO) synthesis in the body and induce vasodilation. Nitric oxide in your body helps your arteries relax and work better, that improves blood flow in your body. It may be helpful for hindering many diseases. The supplement can possibly help reduce blood pressure in people with prehypertension. The supplement also helps ease symptoms of mild-to-moderate erectile dysfunction (ED). Several studies suggest L-citrulline may also help people who have blood vessel problems such as slow wound healing due to diabetes. It also improves muscle protein levels and foils malnourishment in the elderly.[3] The common health benefits of L-Citrulline include:Enhance athletic performance [4] Improves immunity [5] Improves memory [6] Helps people who have Alzheimer’s disease and Parkinson’s disease [7][8] Increase exercise capacity [9] Improves erectile dysfunction (ED) and increases the hardness of erections [10] Promotes blood flow [11] Attenuates blood pressure [12] Improves heart health [13] Helps with diabetes [14] Increases growth hormone [15] Improves cognitive function [16] Reduces fatigue and improves the exercise performance of athletes [17]Some people take L-citrulline to build muscles and improve athletic performance. People also use this supplement to some medical conditions including diabetes mellitus, heart disease, erectile dysfunction, high blood pressure, vascular disease, postoperative pulmonary hypertension and dementia.